How to add descriptor?

[thong]

The fff4 is READ,How do you add descriptors without a notify?

[Joakim Jakobsen]

Hi thong!
For FFF4, the characteristic property READ is enabled. Notification of the value is not permitted.
Could you please try to explain a little closer what you are trying to acheive?

[thong]

When characteristic are only read, add descriptors

[Joakim Jakobsen]

Have you tried the sd_ble_gatts_descriptor_add() ?
Note: It is currently only possible to add a descriptor to the last added characteristic (i.e. only sequential population is supported at this time).